| Rice Pudding Limited | Manufacturing | 2023 |
| Richard Buckley Lighting Ltd | Arts & recreation | 2024 |
| Richard Kell Properties Limited | Real estate | 2018 |
| Richard Scorer Limited | Other services | 2012 |
| Richards Court (Charterhouse Avenue) Freehold Limited | Real estate | 2008 |
| Richardson Export Co Ltd | Wholesale & retail | 2013 |
| Richfields Assets Limited | Real estate | 2021 |
| Richfields Investments Limited | Professional & scientific | 2017 |
| Richman Property Services Limited | Real estate | 2017 |
| Richman VAT Services Limited | Professional & scientific | 2018 |
| Richmond Gate Consulting Limited | Professional & scientific | 2015 |
| Richmond Gate Development Ltd | Construction | 2021 |
| Richmond Nails Limited | Professional & scientific | 2017 |
| Richmond Way Ltd | Other services | 2022 |
| Richpharm (London) Limited | Wholesale & retail | 2012 |
| Richwel Limited | Construction | 2022 |
| Rick Limited | Health & social care | 2009 |
| Rick's Expresstrans Limited | Transport & logistics | 2014 |
| Rickard Properties Ltd | Real estate | 2020 |
| Rickman Accountancy Services Limited | Professional & scientific | 2003 |
| Rickmansworth Glass Limited | Construction | 2019 |
| Rickyn&Co. Limited | Real estate | 2025 |
| Rico Auto Industries (UK) Limited | Wholesale & retail | 2003 |
| Rico Recovery Limited | Transport & logistics | 2019 |
| Riddermark Ltd | Information & communication | 2020 |
| Riddhi Sweets Limited | Wholesale & retail | 2014 |
| Ridego Ltd | Transport & logistics | 2024 |
| Ridgewater Associates Limited | Professional & scientific | 2013 |
| Ridgeway Assets Ltd | Real estate | 2019 |
| Ridgeway Investigations and Security Ltd | Professional & scientific | 2017 |
| Ridpath Limited | Information & communication | 2019 |
| Rids 16 Properties Limited | Real estate | 2024 |
| Rids Commodities Limited | Wholesale & retail | 2022 |
| Riethar Consulting Europe Limited | Construction | 2022 |
| Rifa Enterprises Limited | Real estate | 2024 |
| Riffle Konsult Ltd | Professional & scientific | 2017 |
| Rigglo Investments Ltd | Real estate | 2015 |
| Right Choice Consulting UK Ltd | Professional & scientific | 2007 |
| Right HAT Solutions Limited | Professional & scientific | 2008 |
| Right Inventories London Ltd | Real estate | 2026 |
| Right Inventories Ltd | Real estate | 2021 |
| Right Mechanical Solutions Ltd | Construction | 2012 |
| Right Solutions Financial Limited | Financial services | 2019 |
| Right to Buy Finance Limited | Financial services | 2000 |
| Rightgate Investments Ltd | Real estate | 2019 |
| Righthaus Limited | Real estate | 2018 |
| Rightstart Limited | Real estate | 2012 |
| Rightway Consultants Limited | Information & communication | 1987 |
| Rigist Limited | Information & communication | 2012 |
| Rihc Ltd | Real estate | 2023 |
| Riiva Ltd | Wholesale & retail | 2023 |
| Riken Banna Ltd | Administrative & support | 2024 |
| Rikho Ltd | Wholesale & retail | 2019 |
| Rikis Limited | Wholesale & retail | 2022 |
| Rileybill Limited | Administrative & support | 2013 |
| Rileys Sports Limited | Hospitality | 2025 |
| RIM Construction Services Ltd | Construction | 2025 |
| Rima Properties UK LLP | | 2008 |
| Rimi Food & Wine Ltd | Wholesale & retail | 2017 |
| Rimini Solutions Ltd | Professional & scientific | 2025 |
| Rims Travels Limited | Information & communication | 2024 |
| RIN Sushi Ltd | Hospitality | 2017 |
| Rinavi Limited | Health & social care | 2017 |
| Rincs Property Ltd | Real estate | 2017 |
| Rings of UK Limited | Wholesale & retail | 2026 |
| RIO Blue Limited | Professional & scientific | 2015 |
| RIO Ferdinand Foundation | Professional & scientific | 2012 |
| Rio's Piri Piri Wembley Park Ltd | Hospitality | 2024 |
| Riobell Limited | Wholesale & retail | 2013 |
| Riogold Properties Ltd | Construction | 2021 |
| Rioliver Creative Ltd | Wholesale & retail | 2017 |
| Riona Dundas Ltd | Professional & scientific | 2018 |
| Riordan Eabry & Co. Limited | Financial services | 1976 |
| Rios Piri Piri Finchley Ltd | Hospitality | 2025 |
| Ripa Ripa Ltd | Manufacturing | 2014 |
| Ripon Global Management Ltd | Information & communication | 2025 |
| Ripple Assure Limited | Information & communication | 2026 |
| Ripple Survey Solutions Limited | Construction | 2025 |
| Riri Tech Ltd | Information & communication | 2016 |
| Ririlondon Ltd | Wholesale & retail | 2025 |
| Risan Limited | Real estate | 2002 |
| Risborough Dent Limited | Health & social care | 2024 |
| Rise & Prosper Support Services Ltd | Health & social care | 2019 |
| Rise & Rise Ltd | Construction | 2022 |
| Rise Double Glazing Ltd | Construction | 2023 |
| Rise MEX Limited | Real estate | 2004 |
| Risenepalworldwide Ltd | Professional & scientific | 2025 |
| Rishabh Info Services PVT Ltd | Information & communication | 2004 |
| Rishayan Limited | Real estate | 2019 |
| Rishi & Rohan Limited | Wholesale & retail | 2018 |
| Rishiabode Limited | Real estate | 2019 |
| Rishiv Limited | Financial services | 2020 |
| Rishma Limited | Real estate | 2022 |
| Rishna Suppliers Ltd | Wholesale & retail | 2026 |
| Rishon Ventures UK Ltd | Professional & scientific | 2022 |
| Rishra Estates Ltd | Real estate | 2026 |
| Rishy Investments Limited | Administrative & support | 2010 |
| Rising Stars Nursery Ltd | Education | 2011 |
| Rising Sun Restaurant and Hotel Ltd | Hospitality | 2022 |
| Risj Ltd | Information & communication | 2019 |